The way they calculate the actual space should be a crime. 20ft x 8.5 ft = 170sq ft is the actual floor space. I like that it is built for off grid living but they should provide more details about the actual THOW. Is it steel frame/wood frame. Is there black/grey water. What is the AMP service in the THOW? … so many details missing how is someone supposed to decide? Here is a way that these people can sell the homes quicker. Put down all of the details to these homes that you can. The more the better.